Annual report [Section 13 and 15(d), not S-K Item 405]

DEBT - Schedule of MSCC Funding Balance Sheet (Details)

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DEBT - Schedule of MSCC Funding Balance Sheet (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
ASSETS                    
Investments at fair value: $ 4,932,669 [1] $ 4,286,271 [2]                
Non control investments, cost 4,237,312 [3] 3,725,960 [4]                
Cash and cash equivalents 78,251 60,083                
Interest and dividend receivable and other assets 98,084 89,337                
Deferred financing costs (net of accumulated amortization of $1,859 and $783 as of December 31, 2024 and 2023, respectively) 12,337 7,879                
Deferred financing costs, accumulated amortization 14,592 12,329                
Total assets 5,121,341 4,443,570                
LIABILITIES                    
SPV Facility 2,122,371 1,802,344                
Accounts payable and other liabilities to affiliates 69,631 62,576                
Interest payable 23,290 17,025                
Total liabilities 2,323,503 1,966,171                
NET ASSETS                    
Contributed capital 2,394,492 2,270,549                
Total undistributed earnings 402,462 206,002 $ 77,271              
Total net assets 2,797,838 2,477,399 $ 2,108,586 $ 1,788,846 $ 1,514,767 $ 1,536,390 $ 1,476,049 $ 1,380,368 $ 1,201,481 $ 1,070,894
Total liabilities and net assets 5,121,341 4,443,570                
MSCC Funding I, LLC                    
ASSETS                    
Cash and cash equivalents 11,212 12,817                
Interest and dividend receivable and other assets 4,124 2,956                
Deferred financing costs (net of accumulated amortization of $1,859 and $783 as of December 31, 2024 and 2023, respectively) 6,512 3,829                
Deferred financing costs, accumulated amortization 1,859 783                
Total assets 372,740 336,994                
LIABILITIES                    
SPV Facility 176,000 160,000                
Accounts payable and other liabilities to affiliates 65 7,170                
Interest payable 1,229 1,135                
Total liabilities 177,294 168,305                
NET ASSETS                    
Contributed capital 138,088 138,163                
Total undistributed earnings 57,358 30,526                
Total net assets 195,446 168,689                
Total liabilities and net assets 372,740 336,994                
Non‑Control/Non‑Affiliate investments                    
ASSETS                    
Investments at fair value: 1,997,981 [1],[5] 1,664,571 [2],[6]                
Non control investments, cost 2,077,901 [3],[5] 1,714,935 [4],[6]                
Non‑Control/Non‑Affiliate investments | MSCC Funding I, LLC                    
ASSETS                    
Investments at fair value: 350,892 317,392                
Non control investments, cost $ 351,053 $ 315,373                
[1] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C—Fair Value Hierarchy for Investments—Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.
[2] Investment fair value was determined using significant unobservable inputs, unless otherwise noted. See Note C — Fair Value Hierarchy for Investments — Portfolio Composition for further discussion. Negative fair value is the result of the capitalized discount on the loan or the unfunded commitment being valued below par.
[3] Principal is net of repayments. Cost is net of repayments and accumulated unearned income. Negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.
[4] Principal is net of repayments. Cost is net of repayments and accumulated unearned income. Negative cost is the result of the capitalized discount being greater than the principal amount outstanding on the loan.
[5] Non-Control/Non-Affiliate investments are defined by the 1940 Act as investments that are neither Control investments nor Affiliate investments.
[6] Non-Control/Non-Affiliate investments are defined by the 1940 Act as investments that are neither Control investments nor Affiliate investments.